707-99-64180 7079964180 SERVICE KIT, HOIST CYLINDER ASSEMBLY OF HM400-2 HM400-1

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5. FAQ

Q: What kind of hydraulic pressure can these sealing components withstand steadily?
A: It can adapt to frequent pressure changes under normal construction working conditions.

Q: What different colors can I find inside this repair kit?
A: The rubber O‑rings are black, PU main seals are off‑white, PTFE parts are milky white and wear strips show light brown tone.

Q: Which hydraulic component does this complete seal set repair?
A: It is specially matched for boom hydraulic cylinder, responsible for sealing high‑pressure oil during boom lifting and lowering movements.

Q: What maximum working pressure can these sealing assemblies handle?
A: It can bear high working pressure, suitable for frequent boom movements under heavy digging and loading jobsite conditions.

Q: Does this kit contain all sealing parts required for one full cylinder overhaul?
A: Yes, wiper seals, rod seals, piston seals, backup rings and all matching O‑rings are fully included in one kit package.

Q: Can the sealing combination stop internal leakage and external oil seepage effectively?
A: Multi-stage sealing structure greatly reduces the risk of hydraulic oil leakage.

Q: Can this product prevent hydraulic oil leakage effectively?
A: The precise size design effectively reduces internal leakage and external oil seepage.

Q: What construction scenarios often require this arm cylinder seal kit for regular maintenance?
A: It is widely used for maintaining mini excavators working on villa foundation projects, landscape engineering, pipeline trenching and rural road reconstruction.

6. Exhibition and Wearhous

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